A/N: I don't know the terrain of the underground in story shift is the same like in the original AU so I'm just going to assume that it is.frisk is 17(male) Chara is 18(female)
Frisk was walking barefooted in the Snowden forest he had just snuck out of the ruins from papyrus frisk was different from what he looked like years ago he was taller know because back then he was 4 foot 3 but now he was 5 foot 7 he was wearing torn shorts that came to his knees and a torn navy blue shirt he was walking through the freezing winds and was shivering crazily from the cold he then heard it 'snap' frisk turned his head towards where he assumed the noise came from he saw a silhouette and frisk ran away from it,he heard fast footsteps running towards him he looked back and saw nothing in fact he couldn't hear nothing either he slowed down and didn't hear any running feet or anything he stopped near a tree out of breath nearly collapsing under his weight breathing heavily trying to control his racing heart when he thought he was clear he heard the noise again,he didn't have time to react as something slammed against his gut hard launching him off his feet and landing on his back on instinct he rolled to the left dodging an axe head that almost killed him,he got up and saw the person pulling there axe from the ground it was a two handed Dane axe the person themselves was a female with noticeable curves the girl was wearing almost knee high boots, torn black jeans a white shirt and a brown jacket that had white fur around the collar of the jacket it had dried blood on it as well, she had her hood up but frisk could she was pale white far too white than a normal person should be, she had chestnut brown hair her left eye was covered she had a black scarf around her mouth and a hood covering the top of her head frisk froze because he recognized the person who rushed frisk again and pinned him dropping there large axe to keep him secure and took out a large serrated dagger with a cross guard and was ready to bring the knife down but then, "chara?" Frisk asked somewhat unsure of himself the person now revealed to be Chara widened there eye at that they took a closer look at frisk where their noses were almost touching she widened her eye in recognition she pulled her scarf off Chara had a slightly quivering lip she had her hand near his face but didn't touch him in fear of him not being real, frisk made the move instead, he touched her cheek which made her grasp said hand she had a tear stray down her eye "f-frisk"Chara said hopeful, her voice was slightly ruff but still feminine at the same time it was quivery frisk nodded Chara hugged him tightly in tears sobbing into his neck, frisk reached with his left arm hugging her lower back.
Slight Time skip
After explaining the state of the underground frisk followed Chara to her house and frisk was currently laying down after having to sneak through Snowden to not be spotted and to not get caught after that he went to Chara's room to talk with her so he did and after that he went to sleep because it was night time he was about to go to sleep when he felt a weight on the bed he turned to see Chara close to his face as he was about to speak Chara crashed her lips against his he opened his eyes in shock Chara stuck her tongue inside his mouth and grabbing both sides of his face, she sat on his lap while doing this frisk used his hands and grasped her hips,Chara started grinding on him it was slow but hard they stopped just to get air,a string of saliva connecting there lips Chara took her jacket off tossing it somewhere in the room "Chara wait."frisk said to stop Chara and it worked she stopped
Frisk: "don't you think we're going too fast"Chara replies
Chara"frisk I've wanted this ever since I've met you and ever since you left the underground has got dark depressing and not right and I've waited hoping you would come back"she went right back to kissing him moaning into the kiss, frisk rubbed his hands under her shirt on her sides moving upwards her skin was smooth but he felt some parts of her skin that were ruff like burns or scars he didn't care, Chara moved her arms upwards taking off her shirt and showing her black braw and c-cup breast frisk did the same exposing his slightly toned chest Chara went for his neck and started slightly bite and nibble on his neck
Frisk: "a-Ah"
Chara"hehe~someone is enjoying this"chara said in response to frisk moaning after a couple minutes of this they stopped kissing and frisk went to move the left side of her hair away from her face chara didn't want frisk to see but let him anyway,he moved her hair and saw what was left of her left eye or lack of an eye it was just an empty socket with the skin around the socket being burnt and from the top and bottom the skin looked melted and the strings stretched from top to bottom, chara looked away but frisk made her face him gently smiled and said"your still beautiful"chara smiled and got off of him and went to undo his pants and when she unzipped them she was treated with boxers with a large tent in it she removed them and saw his hard dick, she grabbed the base of the shaft and kissed the tip causing him to groan and moved his head back,Chara swirled her tongue on frisks dick then placed the entirety of it in her throat she didn't have a gag reflex so she took it like a champ and bobbed her head on his dick ,frisk moved his head back and grabbed the back of chara's head she didn't mind and knew frisk was close and bobbed her head faster and frisk came in her mouth chara took off her bra and let it fall to the ground chara got back onto the bed where frisk flipped them over and started biting her neck again causing her to moan in delight he went lower and started messaging her breast and biting one of her nipples and sucking it he kept paying attention to her breast biting,groping,messaging he did the same with her stomach going lower and lower he got up and unbuckled her pants revealing her black panties which was damp,he licked her through her panties causing her to moan loudly and grabbing the back of frisk's head and was wanting more of his attention after a few minutes of this chara came, and frisk knew what they wanted, chara disposed of her panties, turned around and put her hands on the wall on top of the head of the bed,frisk got into position and looked at chara for some form of approval which was of course was yes and was gently sliding in not wanting to hurt her, chara gasped and moaned instintfly she wrapped her legs around his waist and pulled him in deeper making him moan in response chara was covering her face in somewhat like shyness as she didnt know what to do from here frisk did and moved slow and easy for chara to get a feal for it and she bucked her hips back matching him thrust for thrust it was when chara requested anal did things go wild from their chara found it painfull but enjoyed it, too much, she started slow but gradually she grew untaimed wild out of control she kept slaming up and down not slowing down screaming shouting and moaning loudly moving and rotatng her hips frisk wasent keeping up he was just laying there to the point where one would just easily assume he was a corpse just drooling and cumming so many times like their was no tommorow chara finally ran out of stamina and collapsed next to frisk in a daze frisk after (litarally an actual half hour) finally recovered and layed the covers over both of them to keep warm.
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